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LAS VEGAS (CBS Las Vegas) — The Clark County District Attorney’s Office will seek the death penalty for a 19-year-old accused of kidnapping, raping, stabbing and burning the body of a Las Vegas high school sophomore over Labor Day weekend.

District Attorney David Roger cited the brutality of the murder of 15-year-old Alyssa Otremba in the decision to seek capital punishment for Javier Righetti.

Her mother had reported her missing the evening before after Otremba text-messaged her Sept. 2 that she was walking home. Police then attempted to locate the juvenile.

While friends and family were searching for the victim, they found an unrecognizable body in a vacant lot on Sept. 3. The scorched body turned out to be that of the Arbor View High School sophomore.

The Clark County coroner reports that Otremba’s body had between 40 and 80 stab wounds.

Police say Righetti admitted to the killing and another rape and robbery.